Tcpdump command in Linux can be used to capture ICMP packets. We will start with ICMP protocol introduction and then check out how to filter ICMP and ICMPv6 packets with tcpdump command. What is ICMP? ICMP is short for Internet…
/proc/meminfo on Linux displays current system-wide memory performance statistics. It provides the most complete view of system memory usage. Here is a detailed explanation of all the metrics. We can use these memory metrics to troubleshoot Linux memory issues. Related:…
Userdel command can be used to delete a user and related files in Linux. In most Linux distributions, the user home and mail spool directories are not removed when removing a user account with userdel. We are going through the…
The tar command in Linux is used to bundle up multiple files and/or directories. It’s similar to the zip command. However, zip files are compressed by definition; tar files can be compressed, but don’t have to be. How to Use…
Passwd is a basic Linux command to change the user password on Linux. A root user can change the password for any account. A normal user may only change the password for their own account. We have summarized all the…
The tar command in Linux is used to bundle up multiple files and/or directories. It’s similar to the zip command. However, zip files are compressed by definition; tar files can be compressed, but don’t have to be. How tar Works…
In this blog post, we will discuss three different ways to find the largest files on a Linux system. This is a handy trick to know if you are running out of disk space and need to free up some…
We can use this command to find out which process uses the highest CPU or Memory in Linux. # ps -eo pid,ppid,cmd,%mem,%cpu –sort=-%mem |head # ps -eo pid,ppid,cmd,%mem,%cpu –sort=-%cpu |head How to Find the Process Which Uses Most CPU The…
CPU utilization is a key metric to determine how much CPU uses for a process. Today we will review why the CPU utilization for a process is over 100%. This can help us understand how CPU works on Linux. Understanding…
CPU run queue length and load average are key metrics related to system performance. We will review what these two CPU metrics mean today. What is CPU RUN Queue Length on Linux In Linux, a process can be either runnable…
